A canvas shadow text pattern example

<canvas id="canvas" width="620" height="150"></canvas>
<canvas id="canvas2" width="620" height="150"></canvas>
<canvas id="vmlcanvas" class="vml" width="620" height="150"></canvas>

function boot() {
  draw(document.getElementById('canvas').getContext('2d'));
  draw(document.getElementById('canvas2').getContext('2d'), 1);
  draw(document.getElementById('vmlcanvas').getContext('2d'));
}
function draw(ctx, disableShadowBlurAPI) {
  if (disableShadowBlurAPI) {
    ctx.xShadowBlur = 0; // Old Silverlight(ver1, ver2) rendering simulate
  }
  // create new image object to use as pattern
  var img = new Image();
  img.onload = function(){
    // create pattern
    var ptrn = ctx.createPattern(img,'repeat');

    ctx.textBaseline = "top";
    ctx.font = "36pt Arial";
    ctx.fillStyle = ptrn;
    ctx.strokeStyle = ptrn;
    ctx.xMissColor = "skyblue";

    var text = setShadow(ctx, 4, 10, 10, "black");
    ctx.fillText("fillText: "       + text, 20, 20);
    ctx.strokeText("strokeText: "   + text, 20, 80);
  }
  img.src = 'images/sky.jpg?' + (new Date).getTime();
}
function setShadow(ctx, blur, ox, oy, color) {
  ctx.setShadow(color, ox, oy, blur);
  return [color, ox, oy, blur].join(", ");
}